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kewtechcorp.com
Inuence Quantity
Insulation
Resistance
Inuence
Quantity
Loop
Impedance
ZI
EN 61557-3
Continuity
RLO
EN 61557-4
RCD
ΔT
EN 61557-6
RCD
IΔN
EN61557-6
A – Intrinsic Uncertainty 0.8% 0.9% 1% 5.6% 14.4%
E1 – Position 0% 0% 0% 0% 0%
E2 – Supply Voltage 1.0% 0.8% 10% 0.3% 1.3%
E3 - Temperature 0.8% 4.9% 0.7% 2.1% 2.9%
E6 – System Phase
Angle
- 2.4% - - -
E7 – System Frequency - 0.4% - - -
E8 – System Voltage - 1.4% - 0.6% 1.6%
E9 – System Harmonics - 0.8% - - -
E10 – System D.C
Quantities
- 8.4% - - -
Operating Uncertainties